Yeah,I looked at the comparison for both mature vieja's.the mature zonatus looks like a monster when up to that 10 inch mark.I am not upset one bit,I don't plan on returning the zonatus at all,the fish is going to be a keeper for sure either way.Well time for me to shop around somewhere else for a Argentea down the road.People may say try cichlidconnection,but I asked a question days ago about shipping info,never got back to me.So I will try somewhere else if possible.